JPH0698979B2 - Stretched synthetic resin bottle - Google Patents
Stretched synthetic resin bottleInfo
- Publication number
- JPH0698979B2 JPH0698979B2 JP9278786A JP9278786A JPH0698979B2 JP H0698979 B2 JPH0698979 B2 JP H0698979B2 JP 9278786 A JP9278786 A JP 9278786A JP 9278786 A JP9278786 A JP 9278786A JP H0698979 B2 JPH0698979 B2 JP H0698979B2
- Authority
- JP
- Japan
- Prior art keywords
- synthetic resin
- bottle
- wall portion
- stretched
- recessed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D1/00—Rigid or semi-rigid containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material or by deep-drawing operations performed on sheet material
- B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
- B65D1/0223—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by shape
- B65D1/0261—Bottom construction
- B65D1/0276—Bottom construction having a continuous contact surface, e.g. Champagne-type bottom
Landscapes
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は耐熱性に優れた底部形状を有する延伸合成樹脂
製ボトルに関する。TECHNICAL FIELD The present invention relates to a stretched synthetic resin bottle having a bottom shape with excellent heat resistance.
（従来技術） 近年、延伸合成樹脂製ボトルが広く使用されるようにな
り、高温充填、加熱殺菌用として耐熱性が要求されつつ
ある。このため、口栓部、胴部の耐熱性向上を図るとと
もに比較的重量のかかる底部の耐熱性を向上するため
に、底部中央をボトル内方に凹入させるとともにその凹
入内壁に放射状の凹凸を設けたり、あるいは第３図に底
部の断面図を示すようにボトル１の底部４に凹入部６を
設け、その内壁を階段状に形成する等の補強構造が提案
されている。(Prior Art) In recent years, stretched synthetic resin bottles have been widely used, and heat resistance is being demanded for high temperature filling and heat sterilization. For this reason, in order to improve the heat resistance of the spout and body, and to improve the heat resistance of the bottom, which is relatively heavy, the center of the bottom is recessed inside the bottle and the inner wall of the recess has radial irregularities. Alternatively, a reinforcing structure has been proposed in which a bottom portion 4 of the bottle 1 is provided with a recessed portion 6 and the inner wall thereof is formed in a stepped shape as shown in FIG.
（発明が解決しようとする問題点） ここで、上記放射状の凹凸を設けることは周方向に形状
の変化が生ずるために、外観形状にむらが生じ、また単
なる階段状に形成するだけでは耐熱性が不充分であると
いう問題があった。(Problems to be Solved by the Invention) Here, the provision of the radial unevenness causes a change in shape in the circumferential direction, which causes unevenness in the outer shape, and heat resistance is not obtained by merely forming the shape in steps. There was a problem that was insufficient.
（問題点を解決するための手段） 本発明は、上記問題点を底部凹入部の形状を改良するこ
とにより解決せんとしたものであり、以下添付図面によ
り説明する。(Means for Solving Problems) The present invention solves the above problems by improving the shape of the bottom recessed portion, and will be described below with reference to the accompanying drawings.
第１図は本発明の延伸合成樹脂製ボトルの一例を示す部
分断面正面図、第２図は第１図の底面図、第３図は従来
の延伸合成樹脂製ボトルの一例を示す底部断面正面図で
ある。1 is a partial sectional front view showing an example of a stretched synthetic resin bottle of the present invention, FIG. 2 is a bottom view of FIG. 1, and FIG. 3 is a bottom sectional front view showing an example of a conventional stretched synthetic resin bottle. It is a figure.
本発明は第１〜２図に示すように底部中央部にボトル内
方への凹入部６を形成し、底部周縁を接地面５とした延
伸合成樹脂製ボトルにおいて、前記凹入部６を、接地面
から上方に立ち上る傾斜壁部63とその傾斜壁部63上端か
ら内方へ伸びる幅の狭い水平壁部64と、その水平壁部64
内端からほぼ垂直に立上る垂直壁部62と、その垂直壁部
につづいてボトル内方に凹入した大径のドーム状中央膨
出部61とから構成したことを特徴とする延伸合成樹脂製
ボトルである。As shown in FIGS. 1 and 2, the present invention forms a recessed part 6 inward of the bottle in the center of the bottom part, and in a stretched synthetic resin bottle having a bottom peripheral edge as a ground plane 5, the recessed part 6 is The slanted wall portion 63 rising upward from the ground, the slanted wall portion 63, and the narrow horizontal wall portion 64 extending inward from the upper end, and the horizontal wall portion 64.
A stretched synthetic resin characterized by comprising a vertical wall portion 62 that rises substantially vertically from the inner end, and a large-diameter dome-shaped central bulge portion 61 that is recessed inward of the bottle following the vertical wall portion. It is a bottle.
本発明において延伸合成樹脂製ボトル１はポリエチレン
テレフタレート、ポリプロピレン等の合成樹脂からなる
筒状のプリフォームを延伸ブロー成形して得ることでき
る。特に好適な材料は、ポリエチレンテレフタレート、
エチレンテレフタレートを主成分とするコポリエステル
及びそれらのブレンド物等である。そして一般的には、
キャップや栓により密閉し得る口栓部２とその下方のほ
ぼ円筒状の胴部３及び底部４とを有する。In the present invention, the stretched synthetic resin bottle 1 can be obtained by stretch blow molding a tubular preform made of a synthetic resin such as polyethylene terephthalate or polypropylene. Particularly suitable materials are polyethylene terephthalate,
Examples thereof include copolyesters containing ethylene terephthalate as a main component and blends thereof. And in general,
It has a spout part 2 which can be sealed with a cap or a plug, and a substantially cylindrical body part 3 and a bottom part 4 below the spout part 2.
本発明の特徴である底部４は、基本的には外周の接地面
５と中央の凹入部６とを有し、この基本形状により内圧
等に対する強度を保っている。The bottom part 4, which is a feature of the present invention, basically has a ground contact surface 5 on the outer periphery and a recessed part 6 in the center, and the basic shape keeps strength against internal pressure and the like.
そして、接地面５から立ち上る傾斜壁部63は極めて薄く
引き伸ばされ易い接地面の肉厚を適度に調節するために
傾斜させてある。この傾斜壁部63の角度は水平に対し60
〜80度程度にしておくと接地面付近の壁部が充分な延伸
を受け、かつ薄くなり過ぎることがないので好ましい。The inclined wall portion 63 rising from the ground contact surface 5 is inclined so as to appropriately adjust the thickness of the ground contact surface which is extremely thin and is easily stretched. The angle of this inclined wall 63 is 60 with respect to the horizontal.
It is preferable to set the angle to about 80 degrees because the wall portion in the vicinity of the ground contact surface is not sufficiently thinned and does not become too thin.
幅の狭い水平壁部64は、成形時に膨脹しつつある底壁部
に対し、全周にわたり抵抗となるので、それ以降の部
分、すなわち前記傾斜壁部63の延伸が全周に均一に行な
われやすいという効果を生ずる。水平壁部64の幅は２〜
6mmとすると、上記効果が顕著で、かつ強度低下が少な
いので好ましい。Since the horizontal wall portion 64 having a narrow width acts as a resistance over the entire circumference with respect to the bottom wall portion which is expanding at the time of molding, the subsequent portion, that is, the inclined wall portion 63 is uniformly stretched over the entire circumference. The effect is easy. The width of the horizontal wall 64 is 2
When the thickness is 6 mm, the above effect is remarkable and the strength is less likely to decrease, which is preferable.
垂直壁部62は、ほぼ垂直に立ち上るので、比較的延伸し
にくい凹入部上方の壁部を、中央膨出部61の周端から急
激に延伸することにより充分引き伸ばして耐熱性を向上
することができる。この垂直壁部62の角度は水平に対し
80〜90度程度とすると、上記延伸効果が特に優れるので
好ましい。Since the vertical wall portion 62 rises almost vertically, the wall portion above the recessed portion, which is relatively difficult to stretch, can be stretched sufficiently from the peripheral edge of the central bulging portion 61 to be sufficiently stretched to improve heat resistance. it can. The angle of this vertical wall 62 is
When it is set to about 80 to 90 degrees, the above-mentioned stretching effect is particularly excellent, which is preferable.
中央膨出部61は、ボトル内方へ凹入した大径のドーム状
であるので、最も延伸を受けにくい底部中央部が理想的
な耐圧構造に形成できるので加熱による変形の度合も小
さいものである。また、この中央膨出部61の直径として
は、ボトル１の最大直径30％以上とするのが接地面の内
径を大きくとれてボトルの安定性が向上し、50％以下と
するのが成形性に悪影響が少ないので好ましい。そし
て、この中央膨出部の中心の高さは接地面内径Ｈの25〜
40％とするのが充分な延伸が行なえるとともに、成形性
に対する悪影響が少ないので好ましい。Since the central bulging portion 61 is a large-diameter dome shape that is recessed inward of the bottle, the center portion of the bottom portion that is the most difficult to be stretched can be formed into an ideal pressure resistant structure, so the degree of deformation due to heating is small. is there. As for the diameter of the central bulging portion 61, the maximum diameter of the bottle 1 is 30% or more so that the inner diameter of the ground contact surface can be made large to improve the stability of the bottle, and 50% or less is the moldability. It is preferable because it has less adverse effect on. The center height of the central bulge is 25 to 25 mm below the inner diameter H of the ground contact surface.
40% is preferable because sufficient stretching can be performed and there is little adverse effect on moldability.
また、前記垂直壁部の上端の高さは中央膨出部の中心の
高さの55％以上にして延伸効果を向上させるととに75％
以下にして中央膨出部の曲率を大きくとって耐圧性を向
上させるのが好ましい。Further, the height of the upper end of the vertical wall portion is set to 55% or more of the height of the center of the central bulging portion to improve the stretching effect, and 75%
In the following, it is preferable to increase the curvature of the central bulge to improve the pressure resistance.
さらに、前記水平壁部64の位置は、垂直壁部の上端高さ
の略半分とするのが延伸を均一にする効果が大きく好ま
しい。Further, it is preferable that the position of the horizontal wall portion 64 is approximately half of the height of the upper end of the vertical wall portion because the effect of making the stretching uniform is large.
なお、垂直壁部62と中央膨出部61の間に、水平短壁65を
配すると、成形時に膨脹しつつある底壁部に対し全周に
わたり大きな抵抗となるのでそん後の垂直壁部62の延伸
が均一に行なわれやすいと効果があり、好ましい。If a horizontal short wall 65 is arranged between the vertical wall portion 62 and the central bulging portion 61, a large resistance is exerted over the entire circumference with respect to the bottom wall portion which is inflating during molding, so that the vertical wall portion 62 after the vertical wall portion 62 is expanded. It is preferable that the stretching of (1) is easily performed uniformly because it is effective.
もちろん、延伸合成樹脂製ボトル全体の耐熱性を向上す
るために、ブロー延伸成形後に熱処理してもよい。Of course, in order to improve the heat resistance of the entire stretched synthetic resin bottle, heat treatment may be performed after blow stretch molding.
（発明の効果） 以上、説明した如く本発明の延伸合成樹脂製ボトルは、
底部の凹入部６を、接地面から上方に立ち上る傾斜壁部
63とその傾斜壁部63上端から内方へ伸びる幅の狭い水平
壁部64と、その水平壁部64内端からほぼ垂直に立上る垂
直壁部62と、その垂直壁部につづいてボトル内方に凹入
した大径のドーム状中央膨出部61とから構成したので、
比較的延伸を受けにくい中央膨出部は理想的なドーム状
の耐圧形状を有し、その周囲の壁部は極めて大きく延伸
されるので凹入部全体が高温充填、加熱殺菌によっても
変形しにくく、しかも接地面内径が大きくとれて安定性
に優れるという利点を有する。(Effect of the Invention) As described above, the stretched synthetic resin bottle of the present invention,
The bottom wall of the recessed part 6 is an inclined wall part that rises upward from the ground contact surface.
63 and its slanted wall portion 63 A narrow horizontal wall portion 64 that extends inward from the upper end, a vertical wall portion 62 that rises almost vertically from the inner end of the horizontal wall portion 64, and then the vertical wall portion in the bottle. Since it was composed of a large-diameter dome-shaped central bulge portion 61 recessed in one direction,
The central bulging portion, which is relatively difficult to be stretched, has an ideal dome-shaped pressure resistant shape, and the surrounding wall portion is extremely stretched, so that the entire recessed portion is hot-filled and hardly deformed by heat sterilization, Moreover, there is an advantage that the inner diameter of the grounding surface is large and the stability is excellent.
第１図は本発明の延伸合成樹脂製ボトルの一例を示す部
分断面正面図、第２図は第１図の底面図、第３図は従来
の延伸合成樹脂製ボトルの一例を示す底部断面正面図で
ある。 １……延伸合成樹脂製ボトル、４……底部 ５……接地面、６……凹入部 61……中央膨出部、62……垂直壁部 63……傾斜壁部、64……水平壁部1 is a partial sectional front view showing an example of a stretched synthetic resin bottle of the present invention, FIG. 2 is a bottom view of FIG. 1, and FIG. 3 is a bottom sectional front view showing an example of a conventional stretched synthetic resin bottle. It is a figure. 1 ... Bottle of stretched synthetic resin, 4 ... Bottom 5 ... Ground plane, 6 ... Recessed part 61 ... Central bulge part, 62 ... Vertical wall part 63 ... Inclined wall part, 64 ... Horizontal wall Department
Claims (1)
を形成し、底部周縁を接地面（５）とした延伸合成樹脂
製ボトルにおいて、前記凹入部（６）を、接地面から上
方に立ち上る傾斜壁部（63）とその傾斜壁部（63）上端
から内方へ伸びる幅の狭い水平壁部（64）と、その水平
壁部（64）内端からほぼ垂直に立上る垂直壁部（62）
と、その垂直壁部につづいてボトル内方に凹入した大径
のドーム状中央膨出部（61）とから構成したことを特徴
とする延伸合成樹脂製ボトル1. A recessed part (6) inwardly of the bottle at the center of the bottom part.
In the stretched synthetic resin bottle having a bottom edge formed with a ground plane (5), the recessed section (6) has an inclined wall section (63) rising upward from the ground plane and an upper end of the inclined wall section (63). A narrow horizontal wall (64) extending inward from the vertical wall (62) rising almost vertically from the inner end of the horizontal wall (64).
And a stretched synthetic resin bottle characterized by comprising a large-diameter dome-shaped central bulge (61) that is recessed inwardly of the bottle along with its vertical wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9278786A JPH0698979B2 (en) | 1986-04-22 | 1986-04-22 | Stretched synthetic resin bottle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9278786A JPH0698979B2 (en) | 1986-04-22 | 1986-04-22 | Stretched synthetic resin bottle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62251335A JPS62251335A (en) | 1987-11-02 |
| JPH0698979B2 true JPH0698979B2 (en) | 1994-12-07 |
Family
ID=14064130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9278786A Expired - Lifetime JPH0698979B2 (en) | 1986-04-22 | 1986-04-22 | Stretched synthetic resin bottle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0698979B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007008506A (en) * | 2005-06-29 | 2007-01-18 | Yoshino Kogyosho Co Ltd | Synthetic resin housing |
| US20130312368A1 (en) * | 2000-08-31 | 2013-11-28 | John Denner | Plastic container having a deep-set invertible base and related methods |
| US11897656B2 (en) | 2007-02-09 | 2024-02-13 | Co2Pac Limited | Plastic container having a movable base |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01116114U (en) * | 1988-01-30 | 1989-08-04 | ||
| JPH0747293Y2 (en) * | 1990-01-19 | 1995-11-01 | 株式会社吉野工業所 | Bottom structure of resin container |
| JPH0397014U (en) * | 1990-01-23 | 1991-10-04 | ||
| FR2991302B1 (en) * | 2012-05-31 | 2014-07-04 | Sidel Participations | CONTAINER HAVING A BACKGROUND PROVIDED WITH A DECOUCHEMENT VOUTE |
| JP7395951B2 (en) * | 2019-10-23 | 2023-12-12 | 東洋製罐株式会社 | Synthetic resin container |
-
1986
- 1986-04-22 JP JP9278786A patent/JPH0698979B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130312368A1 (en) * | 2000-08-31 | 2013-11-28 | John Denner | Plastic container having a deep-set invertible base and related methods |
| US9731884B2 (en) * | 2000-08-31 | 2017-08-15 | Co2Pac Limited | Method for handling a hot-filled plastic bottle having a deep-set invertible base |
| JP2007008506A (en) * | 2005-06-29 | 2007-01-18 | Yoshino Kogyosho Co Ltd | Synthetic resin housing |
| US11897656B2 (en) | 2007-02-09 | 2024-02-13 | Co2Pac Limited | Plastic container having a movable base |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62251335A (en) | 1987-11-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |